The Critical Porosity of Free Flowing Solids

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Abstract
The behavior of samples of free flowing sand under applied shear stress have been investigated in an annular shear cell of novel design. Measurements of critical porosity, dilation and shear stress are reported and discussed. A random chord size distribution is proposed to characterize a bed of particles and a relationship between this parameter and the critical porosity is derived. Experimental and theoretical values are compared.

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